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Appending entries to visible_rect_history was a hotspot in profiling.
Changing to std::deque, and re-ordering the update code so the deque
only grows to 2 entries rather than 3.

BUG=879668

Cq-Include-Trybots: luci.chromium.try:android_optional_gpu_tests_rel;master.tryserver.blink:linux_trusty_blink_rel
Change-Id: I576ba0ae278a04a0e7336b3b1cd589fadd25b177
Reviewed-on: https://chromium-review.googlesource.com/1200466Reviewed-by: Eric Karl <ericrk@chromium.org>
Commit-Queue: Victor Miura <vmiura@chromium.org>
Cr-Commit-Position: refs/heads/master@{#588238}